<html>

    <head>
        <title>first html </title>

        <style>

            h1{
                color:red;
                text-align:center;
                font-size: 50px;
            }
            h2{
                color:green;
                background-color: #ff00ff;
            }
            .teshu{
                font-style: italic;
                border: 2px solid black;
            }

            #h1title{
                border-radius: 80px;
            }
            
            .njj50{
                padding: 50px;
            }

        </style>

    </head>

    <body>


        <h1 id="h1title" class="teshu">HTML入门</h1>

        <h2>html</h2>
        <blockquote class="teshu njj50">某人说，HTML是通过标签（markup)
            的方式来组织内容</blockquote>
    
        <a href="h2.html" > second page </a>
        <a href="h3.html"> third page</a>
        <h2>css</h2>

        <h2 class="teshu">javascript</h2>


    
    </body>

</html>